Good evening Kevin and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
When we remove the license keys from production (for the purpose of updating/testing the 3 plugins on staging), will the 3 plugins continue to function on production while the license keys are pointing to staging?
Everything will continue to work perfectly.
The only important consequence is that you will temporarily loose the ability to access auto-update of these plugins while the license key has been moved.
Let me know if that helps.
Have a great day!
Geoff B.